ERCC-1 1 and response to chemotherapy. Jean-Charles SORIA, MD, PhD Institut Gustave Roussy
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1 ERCC-1 1 and response to chemotherapy 1 Jean-Charles SORIA, MD, PhD Institut Gustave Roussy
2 Cancer and Chemotherapy: the exemple of Lung Cancer 2 50 CT + supportive care 40 Surgery ± CT Patients (%) RT ± CT 0 Localised Regional Distant RT = radiotherapy CT = chemotherapy
3 Platin-based chemotherapy is the mainstay of first-line treatment for NSCLC Cisplatin/paclitaxel Cisplatin/gemcitabine Cisplatin/docetaxel Carboplatin/paclitaxel Months Schiller JH, et. al. N Engl J Med 2002;346:92 8
4 4
5 Platinum derivatives and DNA repair pathway 5 Platinum cytotoxic effects are related to DNA binding and DNA adducts Nucleotide excision repair (NER) plays a central role in DNA repair pathways ERCC1 enzyme plays a rate-limiting role in the NER pathway In vitro and clinical studies suggest a relation between ERCC1 mrna and response to cisplatin
6 ERCC1 is a rate-limiting partner in the NER pathway 6 Gazdar et al, New England J Med 2007
7 Platinum resistance in vitro 7 ERCC1 mrna or protein expression levels correlate with cisplatin resistance in human cancer cell lines Cancer cell lines ERCC1 expression Phenotypic effets ovarian mrna (3-fold ) Cisplatine resistance ovarian mrna and protein (2-fold ) Repair of cisplatin-dna adducts ovarian ERCC1 anti-sense mrna Restored sensitivity to cisplatine ovarian ERCC1 SiRNA > 53-fold in cisplatin sensitivity cervical mrna Positively correlated with oxaloplatine resistance testis protein Low levels of ERCC1 compared with other cell lines lung ERCC1 anti-sense mrna Decreased the repair capacity Gossage et al, Cancer Treat Rev. 2007
8 ERCC1 as a predictive and/or prognostic marker in human cancers Cancer type Number of patients Treatment ERCC1 expression Resected NSCLC 761 Adjuvant cisplatin-based therapy Protein Resected NSCLC 51 Majority received no chemotherapy mrna 8 Advanced NSCLC 70 G(gemcitabine)/C or C(cisplatin) mrna Advanced NSCLC >400 Randomized to D/C, or D/C if ERCC1 or D/C if ERCC1 mrna Advanced NSCLC 56 G/C mrna Advanced colorectal cancer 50 5FU/oxaliplatin mrna Advanced colorectal cancer 33 Irinotecan mrna Advanced gastric cancer 64 Oxaliplatin/5FU Protein Operable gastric cancer 38 Neoadjuvant C(/F mrna Oesophageal cancer 99 Neoadjuvant CRT(chemoradiotherapy) (C/F) mrna Oesophageal cancer 36 Neoadjuvant CRT (C/F) mrna Ovarian cancer 26 Platinum based therapy mrna Ovarian cancer 28 Platinum based therapy mrna Advanced bladder cancer 57 G/C or G/C/P mrna Gossage et al, Cancer Treat Rev. 2007
9 ASCO 2003: International Adjuvant Lung Trial patients with completely resected NSCLC I-II-IIIA Absolute benefit : 4.1% improvement of 5 year OS 100% 80% HR= 0.86 [ ] p< % 40% 20% 0% The IALT Collaborative Group, NEJM 2004
10 ASCO 2006: IALT-bio study ERCC1: a predictor of chemotherapy benefit? 10 All IALT centers 1867 pts IALT Centers > 10 patients 1045 pts 867 blocks received 783 exploitable NSCLC (after pathological review) 761 patients evaluable for ERCC1
11 Methods: ERCC1 immunohistochemistry 11 Immunohistochemical analysis Standardized antigen retrieval ERCC1 monoclonal antibody (NeoMarkers) Evaluation of staining by two independent investigators, blinded to clinical data Internal controls (normal tissue) Staining intensity and percentage of positive cells (H-score)
12 ERCC1 negative ERCC1 positive 12
13 Predictive Analysis 13 Test of interaction ERCC1 treatment: p = Chemotherapy n=389 5-year survival rate, Control group n=372 5-year survival rate, Hazard ratio for death CT vs. no CT Median survival Median survival ERCC1 negative tumors n=426 47% [40%-55%] 56 months 39% [32%-47%] 42 months 0.65 [ ] p = ERCC1 positive tumors n=335 40% [32%-49%] 50 months 46% [37%-55%] 55 months 1.14 [ ] p = 0.40 Gain of 14 months of overall survival from adjuvant chemotherapy in patients with ERCC1 negative tumor
14 Effect of adjuvant chemotherapy on overall survival in pts with ERCC1 negative tumor 14 Overall Survival 100% 80% 60% 40% 20% Control (113 deaths) Chemotherapy (105 deaths) No at risk Chemotherapy Control 0% Years Adjusted HR=0.65, 95%CI [ ], 0.86], p = 0.002
15 Effect of adjuvant chemotherapy on overall survival in pts with ERCC1 positive tumor 15 Overall Survival 100% 80% 60% 40% 20% Chemotherapy (92 deaths) Control (80 deaths) No at risk Chemotherapy Control 0% Years Adjusted HR=1.14, 95%CI [ ], P = 0.40
16 Prognostic analysis 16 In the control group, ERCC1 positive patients have a favorable prognosis HR * 95% CI P value Control group ERCC1 negative 1 ERCC1 positive 0.66 [ ] 0.90] Chemotherapy ERCC1 negative 1 ERCC1 positive 1.16 [ ] 0.34 All patients ERCC1 negative 1 ERCC1 positive 0.88 [ ] 1.10] 0.26
17 Results 17 ERCC1 negative ERCC1 positive Benefit of Cisplatin-based CT in ERCC1 NEGATIVE patients Olaussen et al, New England J Med 2006
18 18 Prognostic value of ERCC1 and RRM1 in stage I NSCLC patients
19 GILT: the first ERCC1-based customized chemotherapy 19 R A N D O M I Z E Control arm docetaxel / cisplatin Cisplatin 75 mg/m2 day 1 Docetaxel 75 mg/m2 day 1 Experimental arm ERCC1 levels RT-PCR Advanced NSCLC Microdissection then RT-PCR docetaxel / cisplatin (low ERCC1 mrna) Cisplatin 75 mg/m2 day 1 Docetaxel 75 mg/m2 day 1 gemcitabine / docetaxel (high ERCC1 mrna) Docetaxel 40 mg/m2 day 1, 8 Gemcitabine 1000 mg/m2 day 1,8 Rosell et al. ESMO 2006
20 GILT: ERCC1-based customized chemotherapy 20 Projected accrual patients randomized : 283 patients enrolled 17% dropped out! Of which 57% due to insufficient tissue An additional 102 patients were included Total randomized 444 and 366 enrolled Still 17% dropped out
21 GILT: ERCC1-based customized chemotherapy 21 Response rate Statistical difference (p=0.02) 39% in control vs. 51% in genotypic OR in ERCC1 low: 53.7% OR in ERCC1 high: 47.2% No difference in complete response rate 4.3% in control vs 3.1% in genotypic No differences in OS or PFS
22 GILT: ERCC1-based customized chemotherapy 22 Trial initiated in the early 2000s: visionary and extremely audacious! Why is this trial negative? Did ERCC1 failed in identifying patients who should receive cisplatin based chemotherapy? Docexatel-gemcitabine the best non-platinum combination? The control arm received the same chemotherapy as the low ERCC1 and no data on ERCC1 are known in the control arm It would have been better to prospectively confirm that low ERCC1 expressors respond better than high ERCC1 expressors to one platinum combination Methodological and technological issues complicate the interpretation of the study Reproductibility high drop out rate
23 Predictive biomarkers of Ct efficacy 23 Cisplatin Gemcitabine Pemetrexed Paclitaxel Docetaxel ERCC1 RRM1? RRM1? FPGS? MAPtau? Bcl2?
24 ERCC1 open questions 24 Clinical questions Validation of ERCC1 predictive value Molecular and clinical characterization ERCC1 pos/neg pts Future clinical trials Other tumor types Biological questions ERCC1 partners (XPF, XPA, RPA ) Biological function of ERCC1 Regulation of ERCC1 gene expression Methodological perspectives
25 External validation of ERCC1 expression predictive/prognostic prognostic value 25 Assuming 200 patients for BR10 and 400 patients for Anita
26 Clinical characterization of ERCC1 neg/pos pts 26 Brain metastasis are increased in ERCC1 NEG patients treated by CT (non squamous histology, n=335) ERCC1 NEG ERCC1 POS 1,00 0,80 0,60 Control Chemotherapy 1,00 0,80 0,60 Control Chemotherapy 0,40 0,40 0,20 0,20 At risk 0,00 0, Years Years At risk Besse et al. ASCO 2007 Brain metastasis occurrence according to treatment
27 Future clinical trials 27 Design and implement a customized trial of adjuvant Ct integrating ERCC1 data should ERCC1 be associated with other markers (EGFR mut/fish?) to which compounds ERCC1 positive and negative patients are the most likely to respond (beyond cisplatin) should ERCC1 positive patients get a treatment?
28 NSCLC pt1(x>2cm) pt2n0m0 R0 resection SWOG Pilot Study: Pharmacogenomic-directed Adjuvant Therapy of NSCLC RRMI > 40.5 AND ERCC1> 66.0 All Others (RRM1< 40.5 OR ERCC1 < 66.0 ) 28 Age PS 0-10 N~TBD Active Monitoring PI: Bepler Cisplatin-Gemcitabine
29 French adjuvant lung cancer study (IFCT) 29 ARM A (Standard) CDDP doublet EGFR+ Erlotinib ERCC1+ EGFR- No treatment ARM B Customized Bio - Chemo ERCC1- EGFR + EGFR- CDDP doublet followed by erlotinib CDDP doublet
30 ERCC1: open questions 30 Clinical questions Validation of ERCC1 predictive value Molecular and clinical characterization ERCC1 pos/neg pts Future clinical trials Other tumor types Biological questions ERCC1 partners (XPF, XPA, RPA ) Biological function of ERCC1 Regulation of ERCC1 gene expression Methodological perspectives
31 ERCC1 partners in cancer 31 XPF RPA
32 Possible ERCC1 target sites 32 Protein-Protein XPF/ERCC1 Protein-Protein XPA/ERCC1 XPF ERCC1 Protein-DNA K.Tripsianes et al, Nucleic Acids Research, 2007
33 ERCC1 gene expression regulation 33
34 34 Conclusions ERCC1 expression is a predictive factor of chemotherapy benefit in patient treated by cisplatin-based adjuvant chemotherapy ERCC1 expression is a prognostic factor in patient not treated by chemotherapy ERCC1 plays a fundamental function in drug resistance and cancer susceptibility (Janus-faced of ERCC1)
35 35 Conclusions Personalized medicine is one of the strongest expectations from patients and health-care takers The next step integration of the best biomarkers in prospective trials implementation of pharmacogenomic-based clinical trials
36 Acknowledgements 36 Laboratory Investigators Christophe Raynaud Pierre Fouret Laure Sabatier Elisabeth Brambilla Ken Olaussen David Planchard Estelle Taranchon Clinicians Statisticians Julien Domont Christophe Massard Pierre Validire Benjamin Besse Vincent Haddad Ariane Dunant Jean-Pierre Pignon Catherine Hill Fabrice André
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